نتایج جستجو برای: φ morphism
تعداد نتایج: 19033 فیلتر نتایج به سال:
Let K be a number field, let φ ∈ K (t) be a rational map of degree at least 2, and let α, β ∈ K . We show that if α is not in the forward orbit of β, then there is a positive proportion of primes p of K such that α mod p is not in the forward orbit of β mod p. Moreover, we show that a similar result holds for several maps and several points. We also present heuristic and numerical evidence that...
The aim of this paper is to give an explicit geometric description of the birational structure of the moduli space of pairs (C, η), where C is a general curve of genus 3 over an algebraically closed field k of arbitrary characteristic and η ∈ Pic(C)3 is a non trivial divisor class of 3-torsion on C. As it was observed in [B-C04] lemma (2.18), if C is a general curve of genus 3 and η ∈ Pic(C)3 i...
Model verification is to check the correctness of the model implementation comparing with a model specification. The specification is modeling and description properties of a real system. The implementation is the ready to simulation model described from model specification. Our proposed frame work is system morphism based approach, which has various levels of morphism depending on system descr...
The aim of this paper is to give an explicit geometric description of the birational structure of the moduli space of pairs (C, η), where C is a general curve of genus 3 over an algebraically closed field k of arbitrary characteristic and η ∈ Pic(C)3 is a non trivial divisor class of 3-torsion on C. As it was observed in [B-C04] lemma (2.18), if C is a general curve of genus 3 and η ∈ Pic(C)3 i...
We give explicit formulae for the continuous Hochschild and cyclic homology and cohomology of certain ⊗̂-algebras. We use well-developed homological techniques together with some niceties of the theory of locally convex spaces to generalize the results known in the case of Banach algebras and their inverse limits to wider classes of topological algebras. To this end we show that, for a continuou...
We describe the Chow ring with rational coefficients of M0,1(P , d) as the subring of invariants of a ring B(M0,1(P , d);Q), relative to the action of the group of symmetries Sd. We compute B(M0,1(P , d);Q) by following a sequence of intermediate spaces for M0,1(P , d). Introduction The moduli spaces of stable maps from curves to smooth projective varieties were introduced by M.Kontsevich and Y...
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